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Golden trumpet · Allamanda cathartica

Why is my Golden trumpet not producing flowers?

Golden trumpets need specific conditions to put on their signature yellow blooms. The most common reason for a lack of flowers is insufficient sunlight.

Check these first

  1. Measure the amount of direct sunlight the plant gets daily.
  2. Review your recent fertilizer routine.
  3. Check for signs of pests that might be eating the buds.

Likely causes

  1. Insufficient light

    Most likely

    How to tell: The plant looks healthy and green but shows no signs of buds. It may also appear stretched out.

    What to do: Move your plant to a location where it receives at least 6 hours of bright, indirect light or full sun. If indoors, place it near a south facing window.

  2. Wrong fertilizer

    Possible

    How to tell: The plant is growing lots of leaves but no flowers. This often happens with high nitrogen fertilizers.

    What to do: Switch to a bloom booster fertilizer that is higher in phosphorus. Apply it every 4 to 6 weeks during the spring and summer.

When to worry

It is normal for the plant to stop blooming during the cooler winter months. Worry only if it fails to bloom during the peak of summer.

Stopping it coming back

Ensure your plant gets plenty of sun and use a phosphorus rich fertilizer during the active growing season.

Not sure which one it is? Photograph your golden trumpet.

This page lists the usual causes. Pocket Botanist looks at your actual leaf and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

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Questions people ask

Do I need to prune it to get flowers?
Light pruning can encourage branching, which leads to more flowering sites. Prune in late winter before the new growth starts.
How long does it take for a new plant to bloom?
Young plants may take one full season to establish before they start producing flowers. Patience is key.

More problems with Golden trumpet

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This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.